2004 ISUZU TF SERIES Workshop Manual

Page 2313 of 4264

ISUZU TF SERIES 2004  Workshop Manual 3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-317 
DIAGNOSTIC TROUBLE CODE (DTC) P1626 IMMOBILIZER NO SIGNAL 
  
 
 
RTW46EMF000301 
 
Condition For Setting The DTC and Action Taken When The DTC Sets 
Fla

Page 2314 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6E-318 3.5L ENGINE DRIVEABILITY AND EMISSIONS 
Diagnostic Trouble Code (DTC) P1626 Immobilizer No Signal 
 
Step   Action  Value (s)  Yes  No 
1 
Was the "On-Board Diagnostic (OBD) System Check" 
perf

Page 2315 of 4264

ISUZU TF SERIES 2004  Workshop Manual 3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-319 
Step   Action  Value (s)  Yes  No 
7 
 Using the DVM and check the "CHECK ENGINE" 
lamp circuit. 
1.  Ignition "Off", engine "Off".  
2. Disconnect the m

Page 2316 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6E-320 3.5L ENGINE DRIVEABILITY AND EMISSIONS 
Step   Action  Value (s)  Yes  No 
8 
 
 Using the DVM and check the "CHECK ENGINE" 
lamp circuit. 
Breaker box is available:  
1.  Ignition "Off", engin

Page 2317 of 4264

ISUZU TF SERIES 2004  Workshop Manual 3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-321 
Step   Action  Value (s)  Yes  No 
9 
 Using the DVM and check the VSS signal circuit. 
1.  Ignition "Off", engine "Off".  
2. Disconnect the immobilizer

Page 2318 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6E-322 3.5L ENGINE DRIVEABILITY AND EMISSIONS 
Step   Action  Value (s)  Yes  No 
11 
Is the ECM programmed with the latest software 
release?  
If not, download the latest software to the ECM using

Page 2319 of 4264

ISUZU TF SERIES 2004  Workshop Manual 3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-323 
DIAGNOSTIC TROUBLE CODE (DTC) P1631 IMMOBILIZER WRONG SIGNAL 
  
 
 
RTW46EMF000301 
 
Condition For Setting The DTC and Action Taken When The DTC Sets

Page 2320 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6E-324 3.5L ENGINE DRIVEABILITY AND EMISSIONS 
Diagnostic Trouble Code (DTC) P1631 Immobilizer Wrong Signal 
Step   Action  Value (s)  Yes  No 
1 
Was the "On-Board Diagnostic (OBD) System Check" 
per